jquery adds tr element

As a commonly used JavaScript library in front-end development, jQuery has strong practicality and convenience in DOM operations. Among them, dynamically adding HTML elements is one of the common operations of jQuery. Especially when operating tables, dynamically adding

elements is indispensable.

In jQuery, there are many ways to add

elements. Below we will introduce several common methods for reference.

1. Use the append() method

The append() method can add the specified HTML code or element to the end of the existing element. Therefore, we can use the append() method to add the

element to . The sample code is as follows:

$(document).ready(function(){
   $("button").click(function(){
      $("table").append("<tr><td>新行的单元格 1</td><td>新行的单元格 2</td></tr>");
   });
});

In the sample code, when the button is clicked, a new element will be added to the table. The

element.

2. Use the eq() method to dynamically add rows

The eq() method can select elements at specified index positions in the matching element collection. Therefore, we can first get the specified

element, and then use the eq() method to copy it and insert it into the table. The sample code is as follows:

$(document).ready(function(){
   $("button").click(function(){
      var $cloneRow=$("table tr").eq(0).clone();
      $("table").append($cloneRow);
   });
});

In the sample code, we will The first

element is copied and inserted into the table.

3. Use the after() method to add rows

The after() method can insert the specified HTML code or element after the specified element. Therefore, we can insert the new

element into the specified position in the table. The sample code is as follows:

$(document).ready(function(){
   $("button").click(function(){
      var $newRow=$("<tr><td>单元格1</td><td>单元格2</td></tr>");
      $("table tr:eq(0)").after($newRow);
   });
});

In the sample code, we insert the new

element into the table at the specified position. After the first element.

4. Use the appendTo() method to add rows

The appendTo() method can insert the specified element into the internal end position of another specified element. Therefore, we can first create a new

element and insert it into the document, and then use the appendTo() method to insert it into the table. The sample code is as follows:

$(document).ready(function(){
   $("button").click(function(){
      var $newRow=$("<tr><td>单元格1</td><td>单元格2</td></tr>").appendTo("table");
   });
});

In the sample code, We first create a new

element and insert it into the table.

In actual development, choose different methods according to specific needs to implement the operation of adding

elements. No matter which method is used, the flexibility and convenience of jQuery can be used to dynamically modify and expand HTML documents. At the same time, we must also pay attention to properly setting the attributes and styles of elements when dynamically adding elements to ensure the overall beauty of the page.

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